Technical data

22
• For more information about fax modes, see Using Dialogic® Diva® Media Boards as DSP Resource
Board with the Dialogic® Diva® softIP Software on page 22
• Fax* compression MH, MR, MMR
• Error Correction Mode (ECM)*
* Based on T.38 without own Soft Fax stack, feature depends on VoIP Gateway/Terminal.
Media Streaming
• PSTN standard codec, G.711, 64 kbps a-law / µ-law
• RTP/G.711 Clear Channel Fax to CAPI/SDK SFF Fax (incl. all existing T.30 and error correction features)
Tone handling
• Inband DTMF generation and detection (clear channel)
• DTMF generation and detection via RTP event (RFC 2833)
• Basic call origination and termination
Supplementary Services support
• Numbering Services (Called Party Number, Calling Party Number, Redirecting Number supporting also
International E.164 format)
Call Hold/Retrieve
• Call Transfer without consultation call, in active call state (also known as Blind Transfer/Call Deflection in
active state or Single Step Call Transfer).
• SIP side Call Transfer (known as ECT) as transfer target (C-party) and as call initiator (A-party).
• Conference using Line Interconnect (see VoIP / CAPI 2.0 support above)
• Message Waiting Activation/Deactivation (to activate/deactivate MWI lamps on remote phones, e.g.,
connected via a gateway or on IP phones)
Using Dialogic® Diva® Media Boards as DSP Resource Board with the Dialogic® Diva® softIP Software
All Diva Media Boards with DSPs, except Dialogic
®
Diva
®
PRI/E1/T1-8 PCI Media Boards, can be used as
conventional TDM boards and/or as DSP resource board. In the resource board mode, the external interfaces are
disabled and the Diva Media Board functions only in combination with the Diva softIP software and thus provides
functions to voice, clear channel fax and clear channel modem connections. Clear channel fax can be used by
PSTN-IP gateways that do not support T.38 fax so that the fax signal is transmitted in clear channel mode.
If the Diva softIP software is used together with the Diva Media Board as resource board, clear channel fax is
used for fax transmission. If the Diva softIP software is used as stand-alone product, T.38 Fax is used.
If Diva Media Boards with DSPs and the Diva softIP software are installed in the same system, calls that are
initiated without the need to allocate hardware DSP resources (e.g. voice) are preferably routed via the Diva
softIP software. If all available channels of the Diva softIP software are used and no channels of the Diva Media
Board are reserved for DSP usage, the remaining DSP-enabled channels of the Diva Media Board are also used
for non DSP-related calls.
During a call, the call characteristic may change and may require a switchover from the Diva softIP board to the
Diva Media Board or vice versa. In this case, the Combined Board internally reroutes the call using the required
resources. To enable the switchover, you need to combine both boards in the Board Configuration page.